Generally most of the houses depends upon the overhead tanks as the main source of water. People generally switch on the motor when their taps go dry and switch off the motor when the tank starts overflowing. This results in unnecessary wastage of water and sometimes non-availability of water in emergency. This phenomenon is commonly seen in both Urban and rural areas and this needs to controlled by monitoring water level in the tank, here we need a mechanism capable of switching on the motor when the water level in the tank goes low and switching it off as soon as the water level reaches a maximum level. Automatic water level control can be achieved by monitoring and keeping track of water level with the help of electronic sensors and controllers. Ultrasonic sensor is used to monitor the water level by calculating round trip time of echo from transmitter to water surface. Water level obtained from ultrasonic sensor is given to Arduino, where all the calculations and decisions are made. Arduino generate a signal to turn on/off the motor based on water level. This on/off signal and the water level should be communicated to the motor by using RF module where radio waves are used as the means of communication. The motor will be controlled automatically based on the water level in the tank.